55401553 has 2 divisors, whose sum is σ = 55401554. Its totient is φ = 55401552.

The previous prime is 55401547. The next prime is 55401559. The reversal of 55401553 is 35510455.

55401553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (55401547) and next prime (55401559).

It can be written as a sum of positive squares in only one way, i.e., 52751169 + 2650384 = 7263^2 + 1628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55401553 is a prime.

It is not a weakly prime, because it can be changed into another prime (55401559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700776 + 27700777.

It is an arithmetic number, because the mean of its divisors is an integer number (27700777).

Almost surely, 2^55401553 is an apocalyptic number.

It is an amenable number.

55401553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55401553 is an equidigital number, since it uses as much as digits as its factorization.

55401553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55401553 is about 7443.2219502041. The cubic root of 55401553 is about 381.2185100570.

The spelling of 55401553 in words is "fifty-five million, four hundred one thousand, five hundred fifty-three".